RE: So I finally managed to run 13 AMD GPUs on AsRock H110 Pro BTC+ using Ubuntu/Linux
ETH devs plan to move from Proof of Work (PoW) to Proof of Stake (PoS). But there always will be other GPU mineable coins. See here for more about the reasons why ETH plans to move to PoS. @ryn
RE: So I finally managed to run 13 AMD GPUs on AsRock H110 Pro BTC+ using Ubuntu/Linux